That's crazy, my GXP came in at 3997, with the LSA blower on it.
PBM G8 GXP M6-Self flex fuel tune, LTs, Kooks A/B, Monster Stg 3 clutch, Ported LSA S/C, cam, fuel system, stock block and stock heads. Best e.t 10.81/ best mph 135
2007 TBSS-Self tune, bolt ons email@example.com, 2,200 D.A
1991 GMC Syclone- Self tune/catback 12.8@104, 4,200ft D.A